Question

____________ is measured by a biosensor consisting of a silicon wafer pH sensitive layer on which penicillinase enzyme is immobilized.

(a) Penicillin

(b) Glucose

(c) Hormones

(d) Sucrose

I had been asked this question in an interview for job.

Question is from Application of Biosensors in division Biosensors of Enzyme Technology

Answer 1

The correct answer is (a) Penicillin

To explain I would say: Penicillin is measured by a biosensor consisting of a silicon wafer pH sensitive layer on which penicillinase enzyme is immobilized. When the probe is inserted in mmol aqueous solution containing penicillin, penicillin forms penicilloate ion releasing a proton which is proportional to the degree of penicillin concentration.